20413121611 has 2 divisors, whose sum is σ = 20413121612. Its totient is φ = 20413121610.

The previous prime is 20413121567. The next prime is 20413121647. The reversal of 20413121611 is 11612131402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20413121611 - 2³¹ = 18265637963 is a prime.

It is not a weakly prime, because it can be changed into another prime (20413121681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10206560805 + 10206560806.

It is an arithmetic number, because the mean of its divisors is an integer number (10206560806).

Almost surely, 2^20413121611 is an apocalyptic number.

20413121611 is a deficient number, since it is larger than the sum of its proper divisors (1).

20413121611 is an equidigital number, since it uses as much as digits as its factorization.

20413121611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 20413121611 in words is "twenty billion, four hundred thirteen million, one hundred twenty-one thousand, six hundred eleven".